TC Shudder, misdiagnosed as 4WD issue by myself

[NickTransmissions]

Update on this, as i do not drive the vehicle as often. It is for the wife as she described it to me. now that i have driven it over the past couple of days, i have came to the final conclusion that it is something with the transmission, vibrations and or shudder happens more towards middle/backend of the truck. it is a shuddering/hesitation in gear shifts at highway speeds, sometimes at slower speeds. From all the reading and research i have found. I believe now it is likely the Torque converter shudder i've read so much about. I am bringing it to the dealer on Feb 12th. I almost want to try and do a full flush and filter, and install that updated thermal bypass valve to moderate trans temp. Ive noticed it also becomes more noticable when the trans heats up to operating temp, at least what i believe to be operating temp as the LTZ does'nt seem to have an info display on trans temp. Will keep y'all updated after the dealer. Have a feeling dealer is gonna try and stroke me. Just hope if it is close to catastrophic failure they will uphold the extended 100k "bumper to bumper" warranty they sold to me upon purchase of the vehicle last month.

The converter is shot; you can confirm yourself by plugging in a bidirectional scan tool, taking the Tahoe for a drive with TCC slip speed and duty cycle displayed. If TCC slip speed is in excess of 10-15 rpm or so when duty cycle is like 70-80% or so (and you feel the shudder) that's converter going south.

 

[phatz_hatz]

The converter is shot; you can confirm yourself by plugging in a bidirectional scan tool, taking the Tahoe for a drive with TCC slip speed and duty cycle displayed. If TCC slip speed is in excess of 10-15 rpm or so when duty cycle is like 70-80% or so (and you feel the shudder) that's converter going south.

I was waiting for you to come into this thread lol... Now my next question is should she continue to drive it until our appointment at the dealer or should she refrain from use for the meantime to try and prevent any further damage. We are expecting our first child in march and need the truck to be well a truck i intended to get for safety and reliability. OR should we just drive into the ground per say to get the dealership to do the overhaul or replace with a reman. first dealer bought vehicle with a warranty, unsure of how these dealer warranties work.

 

[NickTransmissions]

I was waiting for you to come into this thread lol... Now my next question is should she continue to drive it until our appointment at the dealer or should she refrain from use for the meantime to try and prevent any further damage. We are expecting our first child in march and need the truck to be well a truck i intended to get for safety and reliability. OR should we just drive into the ground per say to get the dealership to do the overhaul or replace with a reman. first dealer bought vehicle with a warranty, unsure of how these dealer warranties work.

While this isnt common by any stretch, if the TC completely grenades itself, it can take the pump out and strand you or whomever is driving the vehicle. Id park it and use another vehicle in the meantime, just to be on the safe side. Let the dealer swap it out (trans and converter).

 

[phatz_hatz]

While this isnt common by any stretch, if the TC completely grenades itself, it can take the pump out and strand you or whomever is driving the vehicle. Id park it and use another vehicle in the meantime, just to be on the safe side. Let the dealer swap it out (trans and converter).

Thank you for your input sir, very much appreciated. Will continue to update here after the dealer visit.